JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" name="copiedValue" id="id1" value="This is first value" />
<input type="radio" name="copiedValue" id="id2" value="This is second value" />
<input type="radio" name="copiedValue" id="id3" value="This is third value" />

<form action="//mysite.com/process1.php"><input name="uniqueid" id="uniqueid" value=""></form>

JavaScript

$("input:radio[name=copiedValue]").click(function() {
    $("input[name=uniqueid]").val($(this).val());
});